Uncrowned is a new destination for all things MMA, boxing, wrestling, and more, featuring Ariel Helwani.Mazzulla shares his message to Tatum after missing game-winner in regulationJoe Mazzulla had some comforting words for Jayson Tatum that gave him the confidence to hit the game-winning shot against the Raptors in overtime.<p><em><a href="https://www.nbcsportsboston.com/nba/boston-celtics/celtics-videos/mazzulla-shares-his-message-to-tatum-after-missing-game-winner-in-regulation/667288/?partner=yahoo&cid=yahoo">Mazzulla shares his message to Tatum after missing game-winner in regulation</a> originally appeared on <a href="https://www.nbcsportsboston.com?cid=yahoo">NBC Sports Boston</a></em>